These rankings were last updated on
August 16, 2018, and are based on the most recent test scores available. We update rankings as we receive new test scores from the
Colorado Department of Education, usually on a yearly basis.

Our sources of data include the
National Center for Education Statistics, U.S. Department of Education and the Colorado Department of Education.

For more information about our ranking process, please see our Ranking FAQ. Details about our methodology are here.